Management and Control of Asian Carps in the United States. Greg Conover Asian Carp Working Group, Chair USFWS, Carterville FRO
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1 Management and Control of Asian Carps in the United States Greg Conover Asian Carp Working Group, Chair USFWS, Carterville FRO
2 Asian Carp 7 carps native to Asia introduced into U.S. Asian carps = bighead, black, grass, silver carps Goldfish (1600 s), Common carp (1800 s) Crucian carp (1900 s) Chicago, Illinois Crucian Carp Sketch Courtesy of Matthew Thomas
3 Grass Carp Sketch Courtesy of Matthew Thomas Aquatic vegetation control Live food fish markets USGS
4 Black Carp Sketch Courtesy of Matthew Thomas USFWS Horseshoe Lake, Alexander County (2001) Mississippi River, below Lock and Dam 22 (2004)
5 Bighead Carp USFWS Live food fish markets Sketch Courtesy of Matthew Thomas
6 Silver Carp Sketch Courtesy of Matthew Thomas USFWS Injurious Wildlife Lacey Act (8/2007)
7 Invasive Species The life history traits of all four of these species indicates that, where established, these four species have a high probability of being considered a nuisance; that is, they are likely to cause adverse ecological and economic effects.
8 Nuisance Species Broad climate tolerance
9 Big Fish with Big Appetites Bighead carp ~ 5 feet, 90 pounds Silver carp > 3 feet, 60 pounds Specialized filter feeders plankton No stomach = feed continuously Quickly grow too large for predators
10 Population Explosion Reproduce quickly Sexually mature in years Mature female = million eggs Dominate fish assemblages Bill Dance Sarah Bauer
11 Rapidly Dispersing Strong swimmers Bighead and silver carp in the Illinois River 40 miles / day Collected within 21 miles of the dispersal barrier and 50 miles of the Great Lakes Bighead Carp USGS
12 Potential Negative Effects Crowd out native fishes Eat the same food that natives depend on All juvenile fish, several adult fish, & mussels Compete for limited resources Potential to alter food webs Result = fewer and smaller native Lower quality sport and commercial fisheries Personal injury and property damages
13 Commercial Harvest Report increasing numbers of Asian carps in Mississippi and Illinois rivers 5-66 tons in a single day Few markets quickly saturated Fishers abandoning traditional sites
14 Illinois River Commercial Harvest Buffalo decreased 35% (pounds) Asian carp increased 124% (pounds) at least in part do to competition with increasing numbers of Asian carps Illinois Commercial Catch Percent of Total Weight Buffalo Asian Carps IL DNR
15 What about the Great Lakes? Asian carp = High risk chance Cannot be certain about specific effects Do know there is incredible potential Multi-billion dollar fisheries and economies at stake Could affect salmon fishery and delay trout restoration Statistical modeling predicted that silver carp could become established 22 tributary rivers identified that could potentially serve as spawning sites Potential impacts to entire Great Lakes drainage
16 Asian Carps = Invasive Species Invasive species degrade basin ecosystems and the economies they support Economic health dependant upon healthy ecosystems Effect how we enjoy and utilize the outdoors Recreation Business Management actions are warranted
17 National Management Plan Asian Carp Working Group Goals: Prevent introductions Limit dispersal Extirpate or reduce population abundances 48 strategies and 136 recommendations
18 Prevention Human mediated activities Primarily an issue for interior waters and Great Lakes 4 highest risk pathways Baitfish transport Transport of wild-caught fish Regulations & Outreach Bill Dance Bill Dance
19 Containment Natural ability of fish to disperse Immediate actions necessary to limit spread and minimize affected waters 6 strategies Prevent interbasin transfers and limit intrabasin movements Forecast, detect, and rapidly respond to new introductions or range expansions
20 Dispersal Barriers Prevent interbasin transfers and limit intrabasin movements Barriers specifically identifies need for redundant barrier systems in Chicago Sanitary and Ship Canal Canals, waterways, and water diversions Permanent and temporary connections Des Plaines River and Deep Run Creek
21 Surveillance & Early Detection Forecast, detect, and rapid response High risk locations and waters of special concern Early detection monitoring Develop rapid response plans
22 Sonic Telemetry Project Difficult to detect with traditional sampling methods, especially when low abundance Network of acoustic receivers 12 stationary receivers 60 mile reach immediately below dispersal barrier 30 surgically implanted transmitters (2 year life) Continuous monitoring
23 Distribution in the Illinois River Starved Rock Established and abundant populations Marseilles and Dresden Island Low numbers of bighead and silver carp confirmed Brandon Road At least one undocumented report X Peoria Starved Rock Marseilles Dresden Island Brandon Road Lockport
24 Report New Sightings!
25 Population Control Integrated Pest Management Great Lakes Sea Lamprey Control Program 8 potential tools Harvest enhancement Biological controls Sterile Asian carps Transgenic Asian carps Pheromones Habitat or hydrologic modifications Piscicides
26 Harvest Enhancement Only near-term tool Important component of integrated control Sport harvest Small, localized benefits Commercial harvest Very limited market demand minimal harvest Risks to consider Demand for sustainable fishery Incentive to stock new waters Sufficient risk to prohibit harvest of other AIS
27 More Questions Than Answers In addition to need for: Developing and enforcing regulations Implementing effective containment measures Developing control tools and IPM program Many additional research needs: Understand basic life history Understand, quantify, and predict impacts Accurately /precisely assess stocks Evaluate and modify management actions
28 For additional information contact: Carterville NFWCO 618/ State Journal Register
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